Home / 12,781.79-19,175.57-3,897.90

Finding the Fourth Proportional to 12,781.79, 19,175.57 and 3,897.90

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Solution

The fourth proportional to 12,781.79, 19,175.57 and 3,897.90 is: 5,847.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,781.79 : 19,175.57 = 3,897.90 : x
  2. Step 2: Convert to fraction form
    12,781.79/19,175.57 = 3,897.90/x
  3. Step 3: Cross multiply
    12,781.79x = 19,175.57 × 3,897.90
  4. Step 4: Simplify right side
    12,781.79x = 74,744,454.30
  5. Step 5: Solve for x
    x = 74,744,454.30/12,781.79
  6. Step 6: Final answer
    x = 5,847.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.